Drilling-machine



(No Model.)

P. H. RICHARDS. DRILLING MACHINE.

No. 419,071. Patented Jan.7,1890

N. PETERS Prawn-Lithographer. wmm nm D. c.

UNITED STATES PATENT QFFICE.

FRANCIS II. RICHARDS, OF HARTFORD, CONNEGTICU T, ASSIGNOR TO ECKLEY B.COXE, OF DRIFTON, PENNSYLVANIA.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 419,071, dated January'7, 1890.

Application filed December 6, 1888. Serial No. 292.845. (No model.)

To all whom it may concern: to said nuts, and at their upper ends are Beit known that I, FRANCIS l'I. RICHARDS, journaled in the brackets 21 and22, respecta citizen of the United States, residing at ively, which areaffixed to the under side of Hartford, in the county of Hartford andState the table T. A coupling-shaft 23 is also jour- 55 of Connecticut,have invented certain new naled in hearings in said brackets, and is anduseful Improvements in Drilling-Mageared to the feed-screws l9 and 20 bythe chines, of which the following is a specificasimilar pairs of gears2t 25 and 26 27, respecttion. ively. Said shaft 23 also has a hand-wheelThis invention relates to multiple drilling- 28, whereby to turn thefeed-screws by hand. 60 1o machines, the object being to furnish a ma-By means of this organization of feed mechchine of that class especiallyadapted for sianism the table may be moved vertically multaneouslydrilling a series of holes, some either by hand or by power. \Vhen thenuts of which are in close proximity to others, and are not revolving,the operator may by means also to provide for the convenient and secureof the hand-wheel turn the screws in either 6 5 r 5 readjustment of thedrills, together with their direction to raise or to lower the table,and driving-spindles, for the drilling of holes at when the shaft 23 isnot revolving (andit may various distances apart. be clamped by aclamp-screw, not shown, if In the drawings accompanying and formthis isnecessary or desirable) the feed-nuts ing a part of this specification,Figure 1 is a 9 and 10 may be revolved, as described, to 7b frontelevation, partially in section,ofadrillfeed up the table. This beingfed up far ing-machine embodying my improvements. enough, the clutch isthen disengaged and Fig. 2 is a side elevation, also partially in secthtable lowered by hand. Stops orlike welltion, of the same. known devices(not shown) may be employed Similar characters designate like parts into hold in place on said table the piece to be 75 all the figures.drilled.

The framework of my improved drilling- That part of the frame-work whichimmemaehine consistsof some suitable column A, diat-ely carries thedrilling mechanism conwhich carries the drilling mechanism and has sistsin a cross-beam B, carried on the coldevices for supporting the table T,on which to umn, and having the upper and lower ribs so place the piecesto be drilled. These devices 31 32, respectively connected by thevertical consist, as shown in the drawings, of vertical wall or backplate 33 of said beam, and also ways on the frame-work and furnishedwith having bearing 3l 35 for the worm-shaft 36. caps 2 and 3 for theslide S. In said ways This principal driving-shaft has, as shown in thefeed-shaft 4 has its bearings, and said the drawings,apulley37, wherebyit is driven, S 3 5 shaft 4 has fixed thereon worms 5 and 6, meshand apulley 38, for carrying the feed-belt 39, ing with the worm-wheels 7 and8, that are affor driving the lower feed-pulley 11. It will fixed to therevolving nuts 9 and 10 in some be obvious, however, that these pulleysmay well-known manner. The shaft 4 is driven be replaced by othersor bydifferent devices by a clutch-pulley 11, and an ordinary sliding forlike purposes without thereby modifying 9o clutch 12, splined on saidshaft, is provided my invention.

with the usual handle or lever 13 for operat- The spindle-heads 0, eachcarrying one ing the same. This lever is or may be cardrill-spindle to,which is provided with a ried by a pivot lat on the bracket 15,projectsuitable drill -11, are adjustably secured upon ing from theframe-work. By throwing the the front of the said beam B by some well- 55 handle 16 of lever 13 toward the right hand known means as, forinstance, the straps 42 in Fig. 1 the pulley 11 is engaged through 43and clamp'screws H. The worm 36 meshes said clutch to turn the shaft 4,and through with a worm-wheel on each spindle. These this shaft and thegearing described to revolve worm-wheels are what I call half-wheels,the nuts 9 and 10, which are carried in the being the ordinary form ofworm-wheel di I00 bearings 17 18, respectively, on the framevided in thecenter at right angles to the work. The feed-screws 19 and 20 are fittedspindle-axis. The said wheels are placed on the spindles alternatelyabove and below the center line of worm 36, so that the upper wheels canoverlap the lower wheels 46, and thus permit the spindles to be set moreclosely together than otherwise on the beam B. This feature isespecially well shown in that part of Fig. 1 in which the two heads 0(shown in section) are set in close proximity to each other .and withthe wheels one extending over the other.

The heads 0, being narrow and of considerable height, require some guideto keep them vertical in addition to their short contact upon the upperand lower edges of the beam B. Accordingly I make in said beam twogrooves or channels 48 50 and construct each of said heads 0 with aguide-bar fitted head can pass under the next adjoining head,

and thus does not interferewith the setting of the heads on the beam onecontiguous to another.

The upper bearing for the spindle has a step 61, which is retained by acheck-nut 63 and takes the upward thrust of the spindle.

This thrust tends strongly to spring the head G, which cannot inpractice be conveniently made rigid'enough in its curved part 65, Fig.2, to resist that thrust without flexure. To obviate this objection andpreserve the wellknown advantages of a step-bearing, I make a ledgeornotch 66, under which the head C is constructed to engage, so that thethrust on step 61 is directly transmitted to the beam at said point 66.

To adjust the head 0 to any required position on the beam, it is onlynecessary to slacken the screws 4A, Fig. 2, when the head may be slidalong, the worm-wheel rolling in the Worm 36 as a gear in a rack Thescrews being then retightened, the spindle thus ad justed is ready foruse.

1 Having thus described my invention, I clai1n 1, In a drilling-machine,the combination, with a spindle-supporting beam, of spindleheads havingupper and lower bearings on said beam and the auxiliary guides interme-.

diate such upper and lower bearings, sub stantially as and for thepurpose specified.

2; In a drilling-machine, the combination, with a spindle-supportingbeam, of spindleheads having engagement with the upper and lower sidesof said beam, the auxiliary guides intermediate such upper and lowersides, a

worm located for driving the spindles in said heads, and half-wheels onsaid spindles arranged alternately above and below each other,substantially as and for the purpose shown. 3

3. In a drilling-machine, the combination, with a spindle-supportingbeam provided in its face with the auxiliary guideways or channels, ofthe spindlerheads having blocks in en.-

gagement with such guideways, substantially as andfor the purpose setforth,

4. In a drilling-machine, the combination of the beam having twoguide-bar channels, substantially as described, and heads adjustablelengthwise of said beam over said channels, one of said heads having aguide-barlying in one channel and adapted to extend therein under acontiguous head, all substantially as described.

5. In a drilling-machine, the combination, with the beam having theledge 66, of the spindle-head adjustable on said beam in engagement withsaid ledge and having the step 61, substantially as described.

6. In a drilling-machine, the combination of a frame-work, the tablecarried on a slide, the feed-screws, one on either side of said slideand both journaled in bearings on said table, a coupling-shaft andgearing, substantially as described, carried on the table andoperatively connecting said screws, (whereby the screws may be'turned byhand,) a pair of revolving feed-nuts carried by the framework andengaging said screws, and a feedshaft and gearing, substantially asdescribed, operatively connecting said nuts, whereby the table may befed up by power, substantially as described.

FRANCIS H. RICHARDS.

Vitnesses:

SAML. W. POWEL, HENRY L. RECKARD.

